Honestly, I feel that. My place is basically a comic book warehouse at this point. I had to get a bunch of those long white boxes and just start labeling them by publisher, it's the only way to keep it from being total chaos. My best find was a beat up copy of Moon Knight #1 for a buck, which is still wild to me.
Damn, that's a serious milestone. I'm honestly curious how you even store that many books without it taking over a whole room. Do you have a specific system, or is it just stacks everywhere? And what's the one dollar bin find you're most proud of, like the absolute best value you ever grabbed?
My uncle tried to store his collection in a shed once, total disaster. A pipe burst and turned like two hundred paperbacks into a solid brick, it was heartbreaking. Makes me keep everything on heavy duty shelves now, no matter how cramped it gets. Best dollar find was probably a first printing of Stephen King's 'Carrie' in a dusty box at a yard sale, the cover was barely hanging on but it's worth a small fortune.